Elderberries can be gathered from an Elderberry Bush. They can be eaten or planted to grow more Elderberry Bushes.

Plant them in a Treeplanter's Pot with 4 Soil and 1 liter of Water, then placed them on an Herbalist Table to begin the sprouting process. If it sprouts, you have 8 hours to plant it. If it dies, you must empty the pot and start over again.